Patio season is not over, Ontario. Another extended stretch of warm weather
Ontario is set to see an extended period of summer-like temperatures, but the dry weather may worsen drought conditions
A stretch of summer-like temperatures is set to settle over Ontario, keeping patio season alive well into mid-September.
Visit our Complete Guide to Fall 2025 for an in depth look at the Fall Forecast, tips to plan for it and much more!
Despite some early signs of frost, a ridge of high pressure moving in from the Prairies will act as a shield, deflecting active weather systems and ensuring drier, warmer conditions for the next 7–10 days.
This weekend, daytime highs will hover in the mid-20s under partly cloudy skies, with only minimal chances of isolated showers.
From Tuesday through Thursday next week, temperatures will trend even higher, reaching the mid to upper 20s, with humidex values approaching 30°C in some areas. Morning lows will remain comfortably in the teens.
By comparison, the normal daytime highs for this time of year are 23°C in Windsor, 21°C in Toronto, and 20°C in Ottawa.
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While this late-season warmth is a welcome extension of summer for many, it intensifies concerns over ongoing dry conditions in parts of the province, where drought conditions persist.
The forecast also includes prolonged stretches of sunshine, with up to 9–10 hours daily in some regions.
This period will certainly give Ontarians a great opportunity to enjoy extended outdoor activities before cooler conditions eventually return.
Wondering how the rest of the season will play out. Be sure to check out the official 2025 Fall Forecast for all of the details.